Gasket stripping



July 5, 1938. w. L. HARLOW 2,122,608

GASKET STRIPPING Filed Dec. 23. 1935 Patented July 5, 1938 UNITED STATES PATENT OFFICE GASKET STBIPPING Woodward L. Harlow, Newton, Mass.

Application December 23, 1935, Serial No. 55,782

11 Claims.

This invention relates to gasket stripping which may be used, for example, for weather stripping of windows and the like, sealing of man and hand hole covers and the like, and while not re- 6 stricted thereto, has been developed more particularly to meet the exacting requirements of casement windows, and where the frame parts are metal, such windows presenting extraordinary difficulties to satisfactory weather stripping, which have hitherto not been satisfactorily met. In such windows the sashes may at some parts make metal to metal contact with the casement frames when the windows are closed normally, and at other points these parts may be spaced apart. Any satisfactory continuous gasket strip of uniform cross section must, therefore, be able to effect a weather-tight joint where the parts are spaced and yet not extend between the sash and its casement frame and prevent contact where there is such contact in the normal closed position of the window. This non-interference with metal to metal contact is of very great importance, particularly where such contact occurs near a hinge axis of the window since any obstruction to complete normal closing here would cause a much greater failure to close remote from the hinge axis.

One of the important objects of the present invention, therefore, is to provide a construction of continuous gasket stripping whereby when applied, metal to metal contact is permitted wherever it will normally take place and wherein the parts will be sealed where such contact is not present.

A further object is to provide a construction wherein any deformation of the strip in use will be ineffective to pull the strip away from the part to which it is secured as by cement. A further object is to provide a stripping construction which will be effective where the relatively removable window or like parts have relative sliding motion as closed position is approached.

A further object is to provide a weather stripping construction which will be serviceable in use.

Further objects and advantages will appear from a more complete description of certain embodiments of this invention shown in the accompanying drawing in which Figure 1 is a front elevation of a metal window construction to which the weather strip may be applied.

showing various forms of strip illustrating this invention.

Figure 9 is a section through a window sash and its casement frame showing the action of a strip like Figure 2 in effecting a weather-tight seal when the relatively movable parts are out of contact when the window is closed.

Figure 10 is a view similar to Figure 9, but showing the frame parts in contact, and

Figures 11 and 12 are sectional views somewhat similar to a portion of Figure 9, but showing the window partly open and closed, respectively, and using the stripping of the form shown in Figure 6.

Referring first to Figures 1, 9 and 10, at I is indicated the side frame portion of a casement window, this frame portion I, as shown, being of substantially 2 cross section. Cooperating with this casement frame is a sash frame 2 also of substantially 2 cross section and carrying between the angularly disposed walls 3 and 4 a retainer 5 to hold the pane of glass 6. The frame 2 is shown as pivoted to the frame I as by the hinge I. In closed position of the window so constructed, the flange 4 of the window may at certain' points contact with the face III of the flange ll of the frame member I and at other points it may be somewhat out of contact with this face when the window is closed.

In accordance with this invention stripping is so applied that where the flange 4 may, in its normal closed position, contact with the face II), it is permitted to do so, but where this flange 4 is spaced from the face I0, it is sealed in weathertight relation thereto. Stripping suitable for this purpose is shown in Figures 2 to 8. In Figure 2, this stripping comprises a body portion I5 of soft yieldable material such as sponge rubber, though it might be extruded or otherwise formed. It is preferably reinforced at both top and bottom faces with a non-extensible but flexible material such as cloth, as at I6 and II. The base face at I 6 is preferably coated with a suitable adhesive by which the stripping may be secured to the face III of the easement frame and this may be protected by an additional tape which may be removed, when it is desired to apply the stripping in position, to expose the adhesive, as shown, for example, in the Brown Patent No. 1,960,137 granted May 22, 1934. Unlike the structure of the Brown patent, however, the outer face of the body is likewise preferably provided with a reinforcing fabric IT. This not only reinforces the strip, but prevents adhesion to the cooperating window member which is likely to occur with a rubber surface particularly if the mating surface contains oil, as when somewhat recently painted. The side face of the body member i5, which may be termed the forward face, is shown as recessed at I8 so that the body strip is channel shape in cross section and, for a purpose which will later appear, the upper portion of the body is partly cut away from the tower portion as by means of a slit I9, leaving a neck of uncut material as at 20 between the inner edge of the slit I9 and the recess I 8. The body strip may be cut of rectangular cross section from a sheet of materiai of a thickness equal to the height of the strip and provided with a fabric reinforcement on opposite faces, after which the recess I and the slit I9 may be cut therein.

The strip such as shown in Figure 2 is cemented in position on the marginal face Ill of the flange II with its recessed face posi tioned toward the frame member 3 when this member is in closed position, as shown in Figures 9 and 10. The

outer edge of the base portion 2i of the strip is positioned at one side of the angularly disposed outer faces of the wall members 3 and 4, which, as usually constructed, meet each other in an outwardly extending bead portion 22, the strip being so placed that this bead portion 22 engages the upper lip portion 23 of the gasket strip above the recess I 8, this lip being spaced from the base portion and extending toward the forward edge thereof. Thus, when the parts 2 and I fail to make metal to metal contact when the window is closed, as shown in Figure 9, the lip or flange portion 23 makes sealing engagement with some part cf the bead portion 22, either bearing on the top face thereof, as shown at the right hand end of Figure 9, or, if the member 4 approaches sufiiciently close to the surface I 0, the rower face of this lip 23 bears on the outer face of the bead 22, as shown at the left end of Figure 9. It will be noted that where the member 2 strikes against the upper face of the lip, it tends to rock the upper or head portion of the strip about the resilient neck portion 20. The provision of the slit I9 prevents this rocking from being transmitted to the outer or rear edge of the stripping in a manner tending to lift it away from the surface I0, which would be likely, if permitted, to cause the stripping to be pulled away from the surface I0 after some period of use. This slit I3, however, affords a yielding neck portion for supporting the upper or head portion of the stripping which can yield or bend without tending to pull the rear edge of the stripping away from the surface to which it is cemented. It also provides for a portion of some substantial width of the full thickness of the strip material presenting a top face for engagement anywhere within this width by the relatively movable frame member, thus providing for commercial variations: in such frames. The substantial width of the bead portion also affords a more susbtantial lateral support for the lip 23. Preferably also the lips 2I and 23 are tapered outwardly so that they more nearly conform under pressure to the shape of the bead portion 22 which may contact therewith, thus to increase the area of such contact and the completeness of sealing.

In Figure 10 is shown the position of the stripping where the frame member 2 may make metal to metal contact with the flange member I I. The lip 23 then engages the bead portion 22 either on or back of the face 4 and may ride up more or less onto the outer face of the portion 3 either above the bead portion 22, as shown at the left end of Figure 10, or on the outer face thereof, as

shown at the right end of Figure 10, depending somewhat on the exact placing of the strip as secured to the frame member I.

In some instances there is more or less relative lateral motion of the'cooperating frame members when approaching closed position. For example, there is some such motion on the left in the construction shown in Figures 9 and 10, due to the relative angular motion of these parts on the hinge I, and this neck portion furnishes a yielding connection between the head and the base of the strip which yields to this motion, permitting the head portion to be rearwardly offset relatively to the base, the engagement of the frame member 2 on the head of the strip forcing this head rearwardly relatively to the base of the strip.

In Figures 3 to 8, other forms of stripping which may be employed in accordance with this invention are illustrated. These may be made of sponge or xtruded rubber with or without a sponge rubber lower face, if desired, or in thin sections even from metal or in combination with metai. In Figure 3 the stripping is. shown as formed of readily deformable material such as sponge rubber reinforced at its top and bottom faces as by the fabric I! and I6, as in the construction shown in Figure 2, but the recess in the forward face is shown as angular as at I 8a, forming the lip or flange portion 23a similar to the corresponding part of the construction shown in Figure 2. Stripping of this form also, is provided with the slit IS in its rear edge for the same purpose as for the construction shown in Figure 2.

In Figure 4, the recess lab in the forward wall is shown as of arcuate contour, but otherwise the construction is the same as in Figures 2 and 3.

In Figure 5 the head portion 30 of the stripping is shown as made of a separate membenfrom the body portion 3| and is secured thereto. The head portion in this construction has the forwardly extending lip 230 which extends beyond the base portion. 3i and the base portion 3i is provided with the slit I9 its rear face as in the constructions previously described. This is in efiect the same as though the base were cut back to the depth of the recess in the forward side face of the strip.

In Figure 6, a somewhat different construction is employed preferably made of extruded rubber. This includes a fiat base portion 35 from which extends a yieldable neck portion 3-6, preferably placed inwardly from opposite edges 31 and 38 of the face portion 35, although with a relatively long neck, such as shown, the stresses which would otherwise tend to lift the back edge of the base portion 35 may be sufficiently taken care of in the length of this neck without requiring any extension of the, base portion back of the root of this neck. This neck also carries at its upper end a head portion 39 having the forwardly extending lip or flange 23d which is spaced from and extends over toward the edge 38 of the base member. This head member may also extend rearwardly of the top of the neck portion 36 as shown at 4.0 in order to impart a desirable lateralstifiness to the head and width of top face for engagement by the movable frame part, although in some cases this may not be important and may be omitted. If desired, the upper and lower faces of this strip may be reinforced with fabric, but if it be made of extruded rubber it is not so important that the upper face be so reinforced. The reinforcement of the lower face has for one of its objects the prevention of the securement of the strip in stretched condition, the recoil tendency tending to release the securement of the strip in position, or to cause it to draw back so as not to produce weather tightness for the full length of the cooperating window parts and this upper face reinforcement also aids in these respects.

In Figure 7 is shown a construction wherein the forward face of the strip is cut back on a bevel to its base, so that in effect the forward face is recessed and the base cut back, as mentioned with respect to the construction shown in Figure, 5. The rear face may be complementally beveled to produce a wider securing face and to save waste in cutting. The fiat cut is easier to produce than a out such as shown in Figures 2, 3 and 4 arid it results in a construction which presents a lip or flange 23c spaced from the base which acts similarly to the corresponding part of each of the constructions hereinbefore described.

Figure 8 illustrates a construction particularly suitable for production by extrusion. It may be extruded as a complete tube with or without a thickened side portion to form a base 45 and the part between the edges 46 and 41 may then be cut out to leave the arcuate portion 48. If the thickened portion to form the base is not initially formed, it will usually be found desirable to secure a suitably shaped part to the tube to form such a base before the tube is cut to form the edges 46' and 41. The portion adjacent to the edge 41 of this construction serves as a lip or flange spaced from the base for sealing engagement with one of the parts to be sealed, this part tending to coil to a shorter radius when pressed upon by such part, that part of the tube toward the base serving as a resilient neck between the base and the head portion spaced from the base.

In Figure 11 a strip such as is shown in Figure 6 is shown as secured in position on the face ll) of the casement frame. The lip or flange portion 23d extends over in position to be contacted by the part 22 of the frame member 2 before this frame member contacts with the face Ill so as to effect sealing engagement therewith should it fail to reach actual contact with the face ID in normally closed position, but permitting such actual face to face contact where the construction and relation of the frame parts will allow this in the final closed position.

Figure 12 shows this sealing of the strip to the member 2 while this member 2 is still spaced somewhat from the face Ill.

While this stripping is shown as applied to a single form of window, it will be evident to those skilled in the art that it may be applied in a similar manner to windows or like parts variously supported for closing and opening movement and that in some cases it may be desirable to attach the strip to the window or other movable part rather than to the casing. It may be employed to great advantage when the parts to be sealed have relatively rough contact faces, as, for example, those produced by casting, as it is not necessary to face off or otherwise render smooth these faces, the sealing taking place not between these faces, but between one of them and an angularly related face which more or less wipes by the sealing lip of the strip when the relatively movable parts approach each other. It will also be evident that various other changes and modifications may be made without departing from the spirit or scope of this invention as defined by the appended claims.

I claim:

1. A gasket strip comprising a body member having a base face for securement to an object, said body member having a recess along a side face to form a pair of spaced edge portions one adjacent to and one remote from said base face, the opposite side face having a slit extending inwardly therefrom toward said recess to leave between them a neck portion.

2. A gasket strip comprising a body member having a base face for securement to an object, said body member having a recess along a side face to form a pair of spaced edge portions one adjacent to and one remote from said base face, the opposite side face having a slit extending inwardly therefrom toward said recess to leave between them a neck portion, said edge portions tapering outwardly.

3. A gasket strip comprising a body member having a base face for securement to an object, said body member having a recess along a side face to form a pair of spaced edge portions one adjacent to and one remote from said base face, the opposite side face having a slit extending inwardly therefrom toward said recess to leave between them a neck portion, said strip being composed of deformable material.

4. A gasket strip comprising a body of soft extensible material, a relatively non-extensible but yieldable material secured at the top and bottom face portions of said strip, said body having a recess in one side face to form a lip overhanging a base in position to form a sealing element for cooperation with a relatively movable part of a structure to which said strip is secured.

5. A gasket strip comprising a body of soft extensible material, a relatively non-extensible but yieldable material secured at the top and bottom face portions of said strip, said bottom face portion having an adhesive coating by which said strip may be -secured in position, said body having a recess in one side face to form a lip overhanging a base in position to form a sealing element for cooperation with a relatively movable part of a structure to which said strip is secured.

6. A gasket strip comprising a body of soft extensible material, a relatively non-extensible but yieldable material secured at the top and bottom face portions of said strip, said body having a recess in one side face to form a lip overhanging a base in position to form a sealing element for cooperation with a relatively movable part of a structure to which said strip is secured, and slit inwardly from the face opposite to said recess.

'7. A gasket strip comprising a body of soft extensible material, a relatively non-extensible but yieldable material secured at the top and bottom face portions of said strip, said bottom face portion having an adhesive coating by which said strip may be secured in position, said body having a recess in one side face to form a lip overhanging a base in position to form a sealing element for cooperation with a relatively movable part of a structure to which said strip is secured,

' and slit inwardly from the face opposite to said recess.

8. A gasket strip comprising a body member having a base face for adhesive securement to an object, said body member having a recess along a side face to form a pair of spaced edge portions tapering outwardly one adjacent to and one remote from said base face, said strip being composed of deformable material, said body also having its upper portion partly severed from its lower 1 portion on the side. opposite to said recess thereby to preventtransverse rocking stresses imparted to said upper portion from reaching the back edge of said strip where it is secured by said ad hesive in a direction to pull said edge loose.

9. In combination, a pair of relatively movable parts having cooperating faces which may contact at certain places when said parts are brought together and at other places be out of contact, one of said parts having a face at an angle to its cooperating face, and a gasket strip secured to the other of said parts and positioned to offer no obstruction to contact between said cooperating faces and having a yieldable .part positioned to make sealing contact with saidflrst part on either its cooperating face or on said angularly related face to effect sealing of said parts when they are brought together irrespective of contact or lack of contact between said cooperating faces at any place.

10. In combination with relatively 'closable and openable building parts, one of said parts having a marginal surface portion and the other having an angular surface portion closable to said marginal surface portion, a gasket stripcomprising a body of strip material having a base face secured to said surface portion at one side of said angular portion in closed position whereby to permit direct contact of said surface portions with each other, said strip having a yieldable portion normally spaced from said base face in position to engage said angular surface portion and eflect a weather-tight seal thereto when said angular surface portion is somewhat spaced from said marginal surface portion.

11. In combination with relatively closable and openable building parts, one of said parts having a marginal surface portion and the other having an angular surface portion provided with a rounded bead at the outer apex of said angle closable to said marginal surface portion, a gasket strip comprising a body of strip material having a base face secured to said surface portion at one side of said angular portion in closed position whereby to permit direct contact of said surface portions with each other, said strip having a yieldable portion normally spaced from said base face in position to engage said bead and effect a weather-tight seal thereto when said angular surface portion is somewhat spaced from said marginal surface portion.

' WOODWARD L. HARLOW. 

